Fan



FIG. 1 is a perspective view of a fan showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a side view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is an underneath plan view thereof. 

We claim the ornamental design for a fan, as shown and described. 